java正则表达式替换

来源：互联网发布：教师网络研修登录入口编辑：程序博客网时间：2024/06/01 10:48

String src = "{\"time1\": \"20140522152004\",\"time2\": \"20140522142035\",\"time2\": \"20140522132035\",\"time2\": \"20140522132035\",\"time2\": \"20140522112035\"";
  Pattern p = Pattern.compile("(\\d{8})(\\d{4})(\\d+)");
  Matcher m = p.matcher(src);
  SimpleDateFormat sdf = new SimpleDateFormat("HHmm");
  while(m.find())
  {
   Date cDate = sdf.parse(m.group(2));
   Calendar calendar = Calendar.getInstance();
   calendar.setTime(cDate);
   calendar.add(Calendar.MINUTE,-30);
   String after = sdf.format(calendar.getTime());

   String oldString = m.group();
   String replaceString = m.group(1)+after+m.group(3);
   src = src.replace(oldString,replaceString);
  }

  System.out.println(src);

按正则表达式查找需要替换的字符串，安装需要的替换的情况为字符串分组，如上述日期+时间，其中只替换小时和分钟

下载例子

0 0